As the xml editor crashes when no sound file exists in ExplosionData, an empty soundfile is used as a workaround.

git-svn-id: https://ja2svn.mooo.com/source/ja2_v1.13_data@2310 4f8fa57e-7814-0410-bad4-adc449f26b7c

gamedir/Data-1.13/TableData/Items/ExplosionData.xml

@@ -135,7 +135,7 @@
 		<name>Debris Smoke</name>
 		<TransKeyFrame>1</TransKeyFrame>
 		<DamageKeyFrame>18</DamageKeyFrame>
-		<ExplosionSoundID>-1</ExplosionSoundID>
+		<ExplosionSoundID>502</ExplosionSoundID>
 		<AltExplosionSoundID>-1</AltExplosionSoundID>
 		<BlastFilename>TILECACHE\TEAR_EXP.STI</BlastFilename>
 		<BlastSpeed>80</BlastSpeed>

gamedir/Data-1.13/TableData/Sounds/Sounds.xml

@@ -501,4 +501,5 @@
 	<SOUND>SOUNDS\WEAPONS\RIFLE SILENCER.ogg</SOUND>
 	<SOUND>SOUNDS\WEAPONS\Misc\hedgetrimmer.ogg</SOUND>
 	<SOUND>SOUNDS\roof_collapse_1.wav</SOUND>
+	<SOUND>SOUNDS\nothing.wav</SOUND>
 </SOUNDLIST>